« Volver al listado

CVE-2023-27598

Estado: ModificadaAlta (7.5)—

OpenSIPS es una implementación de servidor del Protocolo de inicio de sesión (SIP, Session Initiation Protocol). Antes de las versiones 3.1.7 y 3.2.4, el envío de una cabecera `Via` malformada a OpenSIPS provoca un fallo de segmentación cuando se invoca la función `calc_tag_suffix`. Una cabecera `Via` especialmente diseñada, que el analizador considera correcta, pasa cadenas no inicializadas a la función `MD5StringArray`, lo que provoca el fallo. La explotación de esta vulnerabilidad conduce a una denegación de servicio debido a un fallo.

Leer descripción completaMostrar menos

Dado que la cadena no inicializada apunta a la ubicación de memoria `0x0`, no parece posible ninguna otra explotación. No se requieren privilegios especiales de red para llevar a cabo este ataque, siempre que la configuración de OpenSIPS haga uso de funciones como `sl_send_reply` o `sl_gen_totag` que activen el código vulnerable. Este problema se ha corregido en las versiones 3.1.7 y 3.2.4.

Traducción automática del texto original de NVD (en inglés).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Opensips — Opensips

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-27598",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-27598",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-25T14:30:55.171998Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "OpenSIPS",
          "product": "opensips",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.1.7"
            },
            {
              "status": "affected",
              "version": ">= 3.2.0, < 3.2.4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2023-03-15T21:15:09.143",
  "references": [
    {
      "url": "https://github.com/OpenSIPS/opensips/commit/ab611f74f69d9c42be5401c40d56ea06a58f5dd7",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-wxfg-3gwh-rhvx",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/OpenSIPS/opensips/commit/ab611f74f69d9c42be5401c40d56ea06a58f5dd7",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-wxfg-3gwh-rhvx",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, sending a malformed `Via` header to OpenSIPS triggers a segmentation fault when the function `calc_tag_suffix` is called. A specially crafted `Via` header, which is deemed correct by the parser, will pass uninitialized strings to the function `MD5StringArray` which leads to the crash. Abuse of this vulnerability leads to Denial of Service due to a crash. Since the uninitialized string points to memory location `0x0`, no further exploitation appears to be possible. No special network privileges are required to perform this attack, as long as the OpenSIPS configuration makes use of functions such as `sl_send_reply` or `sl_gen_totag` that trigger the vulnerable code. This issue has been fixed in versions 3.1.7 and 3.2.4."
    }
  ],
  "lastModified": "2026-06-17T05:45:33.283",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8EF642AA-D786-40DF-801D-515888AF89BE",
              "versionEndExcluding": "3.1.7"
            },
            {
              "criteria": "cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "34713A76-CAED-43CF-A77C-73F1C36208AA",
              "versionEndExcluding": "3.2.4",
              "versionStartIncluding": "3.2.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}